Pre-Flight Calibration of PIXL for X-ray Fluorescence Elemental Quantification · HackerPapers discussionshttps://hackerpaper.kaipfister.de/p/2402.01544/Collected HN comments and submissions linking this paper.enMon, 02 Nov 2026 11:16:22 GMTPre-Flight Calibration of PIXL for X-ray Fluorescence Elemental Quantification — mentioned by pncnmnphttps://news.ycombinator.com/item?id=45203395urn:hackerpapers:mention:2402.01544:45203395Wed, 10 Sep 2025 20:43:51 GMT<p>Some interesting stuff from the Nature paper &gt; The Perseverance rover has explored and sampled igneous and sedimentary rocks within Jezero Crater to characterize early Martian geological processes and habitability and search for potential biosignatures ..... the organic-carbon-bearing mudstones in the Bright Angel formation contain submillimetre-scale nodules and millimetre-scale reaction fronts enriched in ferrous iron phosphate and sulfide minerals, likely vivianite and greigite, respectively. &gt; Organic matter was detected in the Bright Angel area mudstone targets Cheyava Falls, Walhalla…</p><p><a href="https://hackerpaper.kaipfister.de/p/2402.01544/">Paper and discussion history</a>. A mention is not an endorsement.</p>physics.app-ph